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What is Bootstrap?

...ated by Twitter) that you can use as a basis for creating web sites or web applications. More information and links to download Getting started Examples Themes Bootply - Bootstrap Editor and Builder Update The official bootstrap website is updated and includes a clear definition. "Bootstrap i...
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Optimistic vs. Pessimistic locking

...abort the transaction and the user can re-start it. This strategy is most applicable to high-volume systems and three-tier architectures where you do not necessarily maintain a connection to the database for your session. In this situation the client cannot actually maintain database locks as the ...
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Mail multipart/alternative vs multipart/mixed

... else cids.put(fileName,cid); matcherCssUrl.appendReplacement(sb,replacement.replace("@cid",cid)); } matcherCssUrl.appendTail(sb); html = sb.toString(); return html; } private String getFileName(String fileName) { if (fi...
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What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an

...the kernel for it to be able to find the return address. Arg to register mapping is the same as for int $0x80. You should normally call into the vDSO instead of using sysenter directly. (See The Definitive Guide to Linux System Calls for info on linking and calling into the vDSO, and for more inf...
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CORS - What is the motivation behind introducing preflight requests?

...ght requests have nothing to do with security, and they have no bearing on applications that are being developed now, with an awareness of CORS. Rather, the preflight mechanism benefits servers that were developed without an awareness of CORS, and it functions as a sanity check between the client an...
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What would be C++ limitations compared C language? [closed]

...u are working in. (In some cases this is possible with a few extern "C" wrapper functions, depending on how template/inline a C++ library is.) Taking the first C file in a project I'm working on, this is what happens if you just swap gcc std=c99 for g++: sandiego:$ g++ -g -O1 -pedantic -mfpmath=...
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How to “perfectly” override a dict?

...inimal version that shuts the ABC up. from collections.abc import MutableMapping class TransformedDict(MutableMapping): """A dictionary that applies an arbitrary key-altering function before accessing the keys""" def __init__(self, *args, **kwargs): self.store = dict() ...
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WebSockets vs. Server-Sent events/EventSource

...ata to the browser and receive data from the browser. A good example of an application that could use websockets is a chat application. SSE connections can only push data to the browser. Online stock quotes, or twitters updating timeline or feed are good examples of an application that could benefi...
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Using tags in the with other HTML

... no mainstream browser currently supports the scoped attribute. (Although apparently developer builds of Chromium support it.) HOWEVER, there is an interesting implication of the scoped attribute that pertains to this question. It means that future browsers are mandated via the standard to allow ...
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How to work around the lack of transactions in MongoDB?

...e can update the post collection and comments collection. So what are our approaches that we can take in MongoDB to overcome a lack of transactions? restructure - restructure the code, so that we're working within a single document and taking advantage of the atomic operations that we offer withi...